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correlational
positive effect
Taking glycine before bed might help people get into deep sleep faster, according to sleep monitoring equipment.
Scientific Claim
Glycine ingestion (3 g) before bedtime was associated with reduced sleep latency to slow wave sleep in individuals with chronic unsatisfactory sleep, as measured by polysomnography.
Source Excerpt
“Glycine improved subjective sleep quality and sleep efficacy (sleep time/in-bed time), and shortened PSG latency both to sleep onset and to slow wave sleep without changes in the sleep architecture.”